Chlorinated hydrocarbons are ____
A) toxic compounds used in pesticides and industrial solvents that cause problems in some areas of the ocean
B) created by chemosynthetic bacteria in the ocean
C) a physical resource extracted along with petroleum
D) important nutrients for some species of phytoplankton
A
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Our cognitive images affect our behavior, and influence such things as how much we like a particular place, where we travel, and the foreign policies we encourage
Indicate whether this statement is true or false.
The red areas in the map below are places where
A) soil erosion due to wind is a major problem.
B) soil erosion due to water is a major problem.
C) soil is being formed faster than it is being eroded away.
D) salinization is leaving the soil ineffective for agriculture.
Which of the following statements accurately describes countries with student-teacher ratios below 20 pupils per teacher?
What will be an ideal response?
When a craton is exposed at Earth's surface, it is called a ________
A) caldera B) plate C) transform fault region D) mid-ocean ridge E) continental shield